EP0168780A2 - Dispositif de retournement pour machine d'impression rotative sur feuilles - Google Patents

Dispositif de retournement pour machine d'impression rotative sur feuilles Download PDF

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Publication number
EP0168780A2
EP0168780A2 EP85108658A EP85108658A EP0168780A2 EP 0168780 A2 EP0168780 A2 EP 0168780A2 EP 85108658 A EP85108658 A EP 85108658A EP 85108658 A EP85108658 A EP 85108658A EP 0168780 A2 EP0168780 A2 EP 0168780A2
Authority
EP
European Patent Office
Prior art keywords
sheet
printing
cylinder
turning device
suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85108658A
Other languages
German (de)
English (en)
Other versions
EP0168780A3 (fr
Inventor
Hermann Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0168780A2 publication Critical patent/EP0168780A2/fr
Publication of EP0168780A3 publication Critical patent/EP0168780A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B41F21/108—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine with pneumatic means

Definitions

  • the invention relates to a sheet turning device in a transfer cylinder arranged between the printing cylinders of two printing units of a multi-color sheet-fed rotary printing machine, the diameter and the printing cylinders of which are twice as large as the rubber or forme cylinders of the printing units and each have two gripper systems, each of which mechanical and suction pads include.
  • a sheet turning device is known for example from DE-AS 1 262 294.
  • Such sheet-fed rotary printing presses have single-size plate and blanket cylinders and double-size printing cylinders.
  • a double-sized transfer drum is arranged between the printing units adjacent to the printing cylinders.
  • the sheet to be turned is not immediately transferred from the printing cylinder of the first printing unit to the transfer cylinder, but is almost guided past it. Only when the end of the sheet or the rear area of the sheet approximately reaches the connecting line between the pressure cylinder and the transfer cylinder, is this from the Transfer cylinder arranged grippers detected and supplied to the printing cylinder of the subsequent, ie the second printing unit, in the turned state.
  • the suction pads grip the sheet to be turned in each case at the rear sheet area, lift it from the counter-pressure cylinder with a swivel movement into the interior of the transfer cylinder and transfer the sheet end to a conventional mechanical gripper, which can now pick up the sheet, since the cylinder has continued to rotate in the meantime have so that they can no longer come into collision with the pressure cylinder.
  • the disadvantage of such sheet turning devices is that, especially when processing strong print media, i.e. cardboard, a considerable amount of force is required from the suction pads, especially since the sheets to be turned have to be braked in their original running direction and moved in the opposite direction. A small amount of slip between the suction pads and the end of the sheet is known to lead to a reduction in print quality.
  • the printing unit 1 shows a first printing unit 1 and a second printing unit 2, between which a sheet turning is to take place.
  • the printing unit 1 comprises so-called single-size plate and rubber cylinders 3, 4 and a double-size printing cylinder 5, while the printing unit 2 of the same construction has plate and rubber cylinders 6, 7 and a printing cylinder 8.
  • Mechanical grippers 10, 11 are provided in cylinder pits on the pressure cylinders 5, 8, as indicated on the pressure cylinder 5.
  • the sheet 12 printed in the first printing unit 1 at the front end 14 is guided by the grippers 10 almost past the transfer cylinder 9 until the rear sheet area 15 faces the suction grippers 16 arranged in one half of the transfer cylinder 9.
  • these suction grippers 16 grip the rear arch region 15 and lift it off the pressure cylinder 5, pivoting inwards, as indicated at 16 '.
  • the sheet to be turned is gripped inside the transfer cylinder 9 by mechanical grippers 13, as indicated at 12 '.
  • the suction grippers 16 can now swivel outwards again, which is indicated at 1611, while the mechanical grippers also continue to move the sheet 12 in the direction of the pressure cylinder 8, which results from 12 ′′ or 13 ′.
  • the sheet end 15, which is now leading, is then taken over in a known manner by the grippers of the printing cylinder 8, which are no longer illustrated, and the sheet 12 is printed on the back of the sheet in the printing unit 2.
  • At least one pin 17 is preferably provided in the suction pad 16 in the central area of the suction pad foot 18. When the rear arch region 15 is taken over, this pin can penetrate into it or even pierce it.
  • elastic areas for example strips 19, can be attached to the printing cylinder 5 in the axial direction, into which the tip of the pins 17 can penetrate when the arc 12 is being drilled through. This is particularly beneficial for thin sheets. In the case of relatively thick sheets, such as cardboard, it may be sufficient for the pins 17 in the suction pads 16 for the sheet transport only partially penetrate to create a positive connection between suction pad 16 and the sheet 12.
  • the distance between the tips of the pins 17 and the surface of the printing cylinder 15 is appropriate to set to a fixed amount, for example 1/10 mm.
  • the elastic strips 19 can be dispensed with, since the tips of the pins 17 do not touch the jacket of the printing cylinder 5. It goes without saying that, depending on the number of suction pads used and the size or weight of the sheets to be turned, a correspondingly large number of pins can be arranged in the suction pad 16 in order to achieve the required holding force during the transfer process from the pressure cylinder 5 to the Transfer cylinder 9 to apply.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Registering Or Overturning Sheets (AREA)
EP85108658A 1984-07-20 1985-07-11 Dispositif de retournement pour machine d'impression rotative sur feuilles Withdrawn EP0168780A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3426756A DE3426756C1 (de) 1984-07-20 1984-07-20 Bogen-Wendeeinrichtung fuer Bogenrotationsdruckmaschinen
DE3426756 1984-07-20

Publications (2)

Publication Number Publication Date
EP0168780A2 true EP0168780A2 (fr) 1986-01-22
EP0168780A3 EP0168780A3 (fr) 1987-09-30

Family

ID=6241125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108658A Withdrawn EP0168780A3 (fr) 1984-07-20 1985-07-11 Dispositif de retournement pour machine d'impression rotative sur feuilles

Country Status (4)

Country Link
US (1) US4662277A (fr)
EP (1) EP0168780A3 (fr)
JP (1) JPS61104852A (fr)
DE (1) DE3426756C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238704A3 (fr) * 1986-03-25 1989-08-23 Sakurai Machine Trading Co.; Ltd Presse alimentée en feuilles

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6312393U (fr) * 1986-07-08 1988-01-27
DE3717093A1 (de) * 1987-05-21 1988-12-08 Heidelberger Druckmasch Ag Bogen-rotationsdruckmaschine zur herstellung von einseitigem mehrfarbendruck oder schoen- und widerdruck
RU2157764C2 (ru) * 1995-10-20 2000-10-20 Де ля Рю Жиори С.А. Машина листовой печати
KR100438111B1 (ko) * 1996-02-19 2004-07-16 드라루지오리에쓰.에이. 매엽지(枚葉紙)인쇄기용압동(壓胴)
DE10315193A1 (de) * 2002-04-18 2003-10-30 Heidelberger Druckmasch Ag Gegendruckzylinder in einer Wendeeinrichtung einer bogenverarbeitenden Maschine
DE102019204872A1 (de) * 2018-06-07 2019-12-12 Heidelberger Druckmaschinen Ag Verfahren zum Betrieb einer Wendeeinrichtung einer Druckmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA653558A (en) * 1962-12-04 B. Mitchell Arthur Sheet gripper for printing presses
US1870543A (en) * 1928-12-18 1932-08-09 Wood Newspaper Mach Corp Paper piercing device
US3272549A (en) * 1965-01-13 1966-09-13 Gen Electric Materials handling device
DE1262294B (de) * 1966-07-22 1968-03-07 Planeta Veb Druckmasch Werke Bogenwendeeinrichtung in einem zwischen den Druckzylindern zweier Druckwerke einer Mehrfarbenbogenrotationsdruckmaschine angeordneten UEberfuehrungszylinder
US3550932A (en) * 1968-06-17 1970-12-29 Usm Corp Adjustable pick-off devices
US3654861A (en) * 1970-04-06 1972-04-11 Planeta Veb Druckmasch Werke Sheet carrier cylinder for use in a polychrome rotary printing press adapted for both one-side and two-side printing
JPS5513912B2 (fr) * 1972-07-24 1980-04-12
US4029009A (en) * 1975-07-17 1977-06-14 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Printing machine construction
DD143150A1 (de) * 1979-05-23 1980-08-06 Helmut Schoene Bogengreifereinrichtung
DD154083A1 (de) * 1980-11-17 1982-02-24 Arndt Jentzsch Bogengreifereinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238704A3 (fr) * 1986-03-25 1989-08-23 Sakurai Machine Trading Co.; Ltd Presse alimentée en feuilles

Also Published As

Publication number Publication date
EP0168780A3 (fr) 1987-09-30
US4662277A (en) 1987-05-05
JPS61104852A (ja) 1986-05-23
DE3426756C1 (de) 1985-11-07

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Inventor name: FISCHER, HERMANN